4 pc. SHOCKWAVE Impact Duty 1/4 in. - 1/2 in. Drive Adapter and Reducer Set, Milwaukee Tool, Mfr#: 49-66-6742

IMPACT ADAPTER SET, Black Phosphate, Input Drive Shape Square, Input Drive Size 1/4 in, 3/8 in, 1/2 in, Input Drive Gender Male, Output Drive Shape Square, Output Drive Size 1/4 in, 3/8 in, 1/2 in, Output Drive Gender Female, Locking No, Overall Length 1 in, 1 7/16 in, 1 15/16 in, 2 1/2 in, Impact, Insulated No, Non-Sparking No